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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 01, 2020
USD ($)
Mar. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Document Period End Date     Jun. 30, 2022    
Accrual for Environmental Loss Contingencies     $ 281.0   $ 293.0
Loss Contingency, Estimate of Possible Loss     600.0    
Payments for Environmental Liabilities     6.0 $ 12.0  
Proposed Civil Penalty          
Payments for Legal Settlements     20.0    
Litigation Settlement, Expense     40.0    
Related To Deductibles          
Loss Contingency Accrual, at Carrying Value     $ 182.0   $ 144.0
Sunoco, Inc. [Member]          
Loss Contingency, Pending Claims, Number     4    
Sunoco [Member]          
Site Contingency, Number of Sites Needing Remediation     34    
Culberson          
Loss Contingency, Damages Sought, Value     $ 93.0    
Williams Litigation [Member]          
Loss Contingency, Damages Sought, Value     $ 410.0    
Cline Class Action | Actual Damages          
Payments for Legal Settlements $ 74.8 $ 80.7      
Cline Class Action | punitive damages          
Payments for Legal Settlements   $ 75.0